Content: This work describes accuracy of joint position and joint angles of markerless tracking compared to marker based tracking for the specific case of high performance tennis. The thesis also discusses sport applied value for trainers and coaches in using the technology.

Content: This master thesis examines markerless and hybrid tracking as a more simple, objective and reliable method to perform back to sport sreening compared to rater-based 2D video screenings and marker-based 3D motion capture.

Content: This work describes the accuracy of markerless tracking concerning joint positions relative to full marker based tracking when using 8, 6, 4 and 3 cameras only as well as using low end GoPro cameras.

Content: This work describes accuracy of ground reaction force and joint moment prediction by using only markerless tracking data instead of marker data and force plates. This work is a first proof of concept for getting markerless 3D data and predicting forces, athletes can now be tested just on their playground during training or competitions analyzing full kinematics and even kinetics - no limits to a lab, no preparation of athletes, no specific limited areas for testing an athlete.